On Thu, 21 Jan 1999, Marc Dejardin wrote:

Kernel panic with Xpmac using recent kernel 2.2.0-pre7 (or all > 2.1.24).

Recently I have tryed to update my kernel to recent ones (I was using 2.1.24 
witout any problem) and I encounter problem when I use Xwindow. In general I
have a kernel panic after some seconds or minutes when I launch an application
which uses X11 (xearth, gv, netscape, ...)
The problem does not occur always at the same time. It seems linked to the fact
that recent kernels for linuxppc are optimised for XFree86 and the

The kernel is not optimised for XFree86.

compatibility with the old Xpmac is not perfect.

That's possible.

Linux version 2.2.0-pre7 (dejard1@xxxxxx.xxxxxx.xxx.fr) (gcc version
egcs-2.91.57 19980901 (egcs-1.1 release)) #1 Fri Jan 15 15:50:46 CET 1999

ONE KERNEL PANIC :

Jan 18 09:26:21 xxxxxx kernel: NIP: C00CDF9C XER: E000BE6F LR: C00347CC REGS: c2535cb0 TRAP: 0300

                                      ^^^^^^^^

Jan 18 09:26:21 xxxxxx kernel: MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
Jan 18 09:26:21 xxxxxx kernel: TASK = c2534000[304] 'X' mm->pgd c245e000 Last syscall: 142 
Jan 18 09:26:21 xxxxxx kernel: last math c2534000
Jan 18 09:26:21 xxxxxx kernel: GPR00: C00347CC C2535DA0 C2534000 00000407 00000000 00000000 00000000 C23006C4 
Jan 18 09:26:21 xxxxxx kernel: GPR08: 00000010 C0160000 00000004 C24E5A40 95533E39 01A87568 01A80000 6C7A336E 
Jan 18 09:26:21 xxxxxx kernel: GPR16: 01A8B3AC 01A8B52C 00000000 553DBE39 533DBE39 C2F58280 C2535E18 00000001 
Jan 18 09:26:21 xxxxxx kernel: GPR24: 00002ECD C2F58000 0000000F 00000000 C015A39C C2F58000 00000407 C1E8E000 
Jan 18 09:26:21 xxxxxx kernel: Call backtrace: 
Jan 18 09:26:21 xxxxxx kernel: C2F58000 C00347CC C0034BB8 C0007A70 C0003898 01837B64 0180E1D4 

                                 ^^^^^^^^ ^^^^^^^^ ^^^^^^^^ ^^^^^^^^ ^^^^^^^^ ^^^^^^^^ ^^^^^^^^

Jan 18 09:26:21 xxxxxx kernel: 01822310 01801BD4 

                                 ^^^^^^^^ ^^^^^^^^
Please look up these numbers in your System.map.

Jan 18 09:26:21 xxxxxx kernel: Instruction DUMP: 41820028  3d20c019  83a94558 <4bf5b87d> 7c641b78  7f85e378  7fa3eb78  4bf44fa5  38000001 
Jan 18 09:26:21 xxxxxx kernel: Kernel panic: kernel access of bad area pc c00cdf9c lr c00347cc address 453 tsk X/304

                                                                                                         ^^^
0x453, makes me think of a NULL pointer dereference for a struct.

Greetings,

						Geert

--
Geert Uytterhoeven                     Geert.Uytterhoeven@cs.kuleuven.ac.be
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}  http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium

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